Pseudomonas luteola

Morphology

Pseudomonas luteola is a Gram-negative, motile aerobe. Its motility is created by multitrichous flagella. They grow as rods of 0.8 μm to 2.5 μm. Colonies produce a yellow-orange pigment. Optimal temperature for growth is 30 °C. Importantly for classification, it grows best on heart infusion agar supplemented with 5% horse blood. It is also able to grow on TSA, Nutrient Agar, Mac Conkey or CASA Agar.

Biosorption

Pseudomonas luteola can absorb certain heavy metals such as Cr(VI) and Al(III). Both ions are found in industrial wastewaters. These metals are specifically targeted by P. luteola strain TEM05. Under relatively acidic conditions (pH: 4 and 5 for each ion respectively). Experiments indicated a maximum adsorption capacity of 55.2 mg g−1 for Al(III) and 3.0 mg g−1 for Cr(VI).

This same strain is also known to produce an exopolysaccharide (EPS) utilized in the adsorption of nickel and copper. In order to adsorb Ni and Cu at significant levels, the strain must be immobilized in a calcium alginate beads. With this enhancement, maximum adsorption capacities range from 45.87 to 50.81 mg g−1 and 52.91–61.73 mg g−1, respectively.

Pathenogenicity

The pathogenic form of Pseudomonas luteola is a saprophyte. It is an opportunistic pathogen that can cause bacteremia, meningitis, prosthetic valve endocarditis, peritonitis in humans and animals. P. luteola is registered by the CDC as group Ve-1. Most strains are susceptible to broad-spectrum antibiotics, such as cephalosporins, aminosids, and ciprofloxacin. However, infections associated with foreign material are highly resistant, and infected prostheses have to be removed if possible.

References

References

1. (1997). "The Phylogeny of the Genera ''Chryseomonas'', ''Flavimonas'', and ''Pseudomonas'' Supports Synonymy of These Three Genera". International Journal of Systematic Bacteriology.
2. http://www.tgw1916.net/Pseudomonas/luteola.html{{full citation needed. (January 2013)
3. (2004). "''Chryseomonas luteola'' Identified as the Source of Serious Infections in a Moroccan University Hospital". Journal of Clinical Microbiology.
4. (2004). "Chromium and aluminum biosorption on Chryseomonas luteola TEM05". Applied Microbiology and Biotechnology.
5. (2005). "Utilization of an exopolysaccharide produced by Chryseomonas luteola TEM05 in alginate beads for adsorption of cadmium and cobalt ions". Bioresource Technology.